Mental Modulation

• WWizards of the Coast2025-07-25
  Official Ruling
  If the target permanent is an illegal target as Mental Modulation tries to resolve, it won’t resolve and none of its effects will happen. You won’t draw a card.
• WWizards of the Coast2025-07-25
  Official Ruling
  To determine the total cost of a spell, start with the mana cost or alternative cost you’re paying, add any cost increases, then apply any cost reductions. The mana value of the spell remains unchanged, no matter what the total cost to cast it was.

Rulings via Scryfall